Method plus

base/src/test/java/net/time4j/range/YearsTest.java:189–200

()

    }

    @Test
    public void plus() {
        assertThat(
            Years.ofGregorian(-24).plus(Years.ofGregorian(3)),
            is(Years.ofGregorian(-21)));
        assertThat(
            Years.ofGregorian(24).plus(3),
            is(Years.ofGregorian(27)));
        assertThat(
            Years.ZERO.plus(0),
            is(Years.ofGregorian(0)));
    }

    @Test(expected=ArithmeticException.class)
    public void plusOverflow() {